API v1 had a way of doing this, there was an onDraw overridable for the
marker. I don't know how to do that in the current maps API version or if
it's even possible.
On 4 July 2013 18:50, Agustín Giménez <geni...@gmail.com> wrote:
> Well, md will eat some resources, so it may be a combination of too many
> bitmaps plus the md overhead...
>
> A way to avoid this, is using custom overlays and draw it by yourself,
> load the initial bitmap in memory and on the draw of the overlay draw the
> image and the text, in this way you will not use any memory at all.
>
> Enviado desde mi iPad
>
> El 04/07/2013, a las 19:35, Goncalo Oliveira <gonc...@minkan.net>
> escribió:
> L
>
> Augustin,
>
> Thanks for replying. I actually did try to call Recycle and Dispose on the
> bitmaps, also nulling instances and GC.Collect a bit. None of those worked.
> And adding to the fact that it didn't work, it also slowed things a lot
> (kind of expected).
>
> However, I did went to the trouble of making a copy of the test case app
> in Java using Android Studio and the results were very different. I was
> able to display 1800 markers with custom bitmaps. So, yes, 900 markers is a
> lot of juice but still, the expected behaviour was somewhat different. The
> Xamarin - JVM bridge seems to be causing some struggle.
>
> -- side note, Android Studio is kind of... very good... too bad it's Java.
>
> Cheers.
>
>
>
> On 4 July 2013 18:26, Agustín Giménez <geni...@gmail.com> wrote:
>
>> Hi.
>>
>> I may be wrong, but I velibe its normal.
>>
>> When you are giving a resource as bitmap, i think it will reuse the same
>> bitmap all the time, so you have 900 markers, but only a bitmap. But with
>> your function you are creating 900 bitmaps, so you are eating a lot of
>> memory. Also you arent disposing anything, try to dispose all the resources
>> you will not use and may be it will work.
>>
>> Also a GC.Collect can help.
>>
>> Hope it helps.
>>
>> Enviado desde mi iPad
>>
>> El 04/07/2013, a las 16:44, Goncalo Oliveira <gonc...@minkan.net>
>> escribió:
>>
>> Hi,
>>
>> I'm facing an issue with Google maps and custom bitmaps as marker icons
>> and I'm a little confused if I'm doing the thing the wrong way or there's
>> something wrong happening either with Google maps component or with the
>> Xamarin - JVM bridge.
>>
>> 1. I'm placing a huge quantity of markers on the map. Let's start with
>> 900. I'm generating random locations around a point to create these much
>> different LatLng objects.
>>
>> Next, I do the following for each LatLng item.
>>
>> string title = "Item " + ( itemIndex++ ).ToString(); //
>> just for readability
>>
>> var iconMarkerOption = new MarkerOptions()
>> .SetPosition( item )
>> .SetSnippet( "Snippet" )
>> .Anchor( 0.5f, 0.5f )
>> .SetTitle( title );
>>
>> map.AddMarker( iconMarkerOption );
>>
>> Build, Run and... all's well. 900 markers on the screen and not a care in
>> the world.
>>
>> 2. I don't want to use the default image, to I change the code to use my
>> own.
>>
>> var iconMarkerOption = new MarkerOptions()
>> .SetPosition( item )
>> .SetSnippet( "Snippet" )
>> .Anchor( 0.5f, 0.5f )
>> .InvokeIcon( BitmapDescriptorFactory.FromResource(
>> Resource.Drawable.ic_marker1 ) )
>> .SetTitle( title );
>>
>> Again, build, run and... all's well. 900 markers on the screen with my
>> own icon.
>>
>> 3. I don't want just a standard image, I want to add some label text to
>> each icon. So I create the following method.
>>
>> private Paint paint = new Paint( PaintFlags.AntiAlias );
>> private Rect bounds = new Rect();
>> private BitmapDescriptor GetCustomBitmapDescriptor( string text )
>> {
>> Bitmap baseBitmap = BitmapFactory.DecodeResource( Resources,
>> Resource.Drawable.ic_marker1 );
>> Bitmap bitmap = baseBitmap.Copy( Bitmap.Config.Argb8888, true
>> );
>>
>> paint.GetTextBounds( text, 0, text.Length, bounds );
>>
>> float x = bitmap.Width / 2.0f;
>> float y = ( bitmap.Height - bounds.Height() ) / 2.0f -
>> bounds.Top;
>>
>> Canvas canvas = new Canvas( bitmap );
>>
>> canvas.DrawText( text, x, y, paint );
>>
>> BitmapDescriptor icon = BitmapDescriptorFactory.FromBitmap(
>> bitmap );
>>
>> return ( icon );
>> }
>>
>> and I change my code
>>
>> var iconMarkerOption = new MarkerOptions()
>> .SetPosition( item )
>> .SetSnippet( "Snippet" )
>> .Anchor( 0.5f, 0.5f )
>> .InvokeIcon( GetCustomBitmapDescriptor( title ) )
>> .SetTitle( title );
>>
>> Build, run and... out of memory.
>> 07-04 15:32:35.055: E/mono(6005): Unhandled Exception:
>> 07-04 15:32:35.055: E/mono(6005): Java.Lang.OutOfMemoryError: Exception
>> of type 'Java.Lang.OutOfMemoryError' was thrown.
>> 07-04 15:32:35.055: E/mono(6005): at
>> Android.Runtime.JNIEnv.CallStaticObjectMethod
>> (intptr,intptr,Android.Runtime.JValue[]) <0x00080>
>> 07-04 15:32:35.055: E/mono(6005): at
>> Android.Gms.Maps.Model.BitmapDescriptorFactory.FromBitmap
>> (Android.Graphics.Bitmap) <0x00103>
>> 07-04 15:32:35.055: E/mono(6005): at
>> MapsExtensionsTest.MainActivity.GetCustomBitmapDescriptor (string) <0x001b7>
>> 07-04 15:32:35.055: E/mono(6005): at
>> MapsExtensionsTest.MainActivity.button_Click (object,System.EventArgs)
>> <0x00187>
>> 07-04 15:32:35.055: E/mono(6005): at
>> Android.Views.View/IOnClickListenerImplementor.OnClick (Android.Views.View)
>> <0x0005b>
>> 07-04 15:32:35.055: E/mono(6005): at
>> Android.Views.View/IOnClickListenerInvoker.n_OnClick_Landroid_view_View_
>> (intptr,intptr,intptr) <0x0005b>
>> 07-04 15:32:35.055: E/mono(6005): at (wrapper dynamic-method)
>> object.d67d7456-e896-445d-be35-db0b39982fc0 (intptr,intptr,intptr) <0x00043>
>> 07-04 15:32:35.055: E/mono(6005): --- End of managed exception stack
>> trace ---
>> 07-04 15:32:35.055: E/mono(6005): java.lang.OutOfMemoryError
>> 07-04 15:32:35.055: E/mono(6005): at
>> android.graphics.Bitmap.nativeCreateFromParcel(Native Method)
>>
>> I tried changing the baseBitmap decoding to some place else, so that it's
>> only called once, as it's kind of lame to do this every single time.
>>
>> private Paint paint = new Paint( PaintFlags.AntiAlias );
>> private Rect bounds = new Rect();
>> Bitmap baseBitmap = null;
>> private BitmapDescriptor GetCustomBitmapDescriptor( string text )
>> {
>> if ( baseBitmap == null )
>> {
>> baseBitmap = BitmapFactory.DecodeResource( Resources,
>> Resource.Drawable.ic_marker1 );
>> }
>>
>> Bitmap bitmap = baseBitmap.Copy( Bitmap.Config.Argb8888, true
>> );
>>
>> paint.GetTextBounds( text, 0, text.Length, bounds );
>>
>> float x = bitmap.Width / 2.0f;
>> float y = ( bitmap.Height - bounds.Height() ) / 2.0f -
>> bounds.Top;
>>
>> Canvas canvas = new Canvas( bitmap );
>>
>> canvas.DrawText( text, x, y, paint );
>>
>> BitmapDescriptor icon = BitmapDescriptorFactory.FromBitmap(
>> bitmap );
>>
>> return ( icon );
>> }
>>
>> Build, run and... again, out of memory...
>> 07-04 15:36:42.175: E/mono(6409): Java.Lang.OutOfMemoryError: Exception
>> of type 'Java.Lang.OutOfMemoryError' was thrown.
>> 07-04 15:36:42.175: E/mono(6409): at
>> Android.Runtime.JNIEnv.CallObjectMethod
>> (intptr,intptr,Android.Runtime.JValue[]) <0x00080>
>> 07-04 15:36:42.175: E/mono(6409): at Android.Graphics.Bitmap.Copy
>> (Android.Graphics.Bitmap/Config,bool) <0x00167>
>> 07-04 15:36:42.175: E/mono(6409): at
>> MapsExtensionsTest.MainActivity.GetCustomBitmapDescriptor (string) <0x00097>
>> 07-04 15:36:42.175: E/mono(6409): at
>> MapsExtensionsTest.MainActivity.button_Click (object,System.EventArgs)
>> <0x00187>
>> 07-04 15:36:42.175: E/mono(6409): at
>> Android.Views.View/IOnClickListenerImplementor.OnClick (Android.Views.View)
>> <0x0005b>
>> 07-04 15:36:42.175: E/mono(6409): at
>> Android.Views.View/IOnClickListenerInvoker.n_OnClick_Landroid_view_View_
>> (intptr,intptr,intptr) <0x0005b>
>> 07-04 15:36:42.175: E/mono(6409): at (wrapper dynamic-method)
>> object.8ea9efe6-5373-404e-9980-0a2a1ca9397f (intptr,intptr,intptr) <0x00043>
>> 07-04 15:36:42.175: E/mono(6409): --- End of managed exception stack
>> trace ---
>> 07-04 15:36:42.175: E/mono(6409): java.lang.OutOfMemoryError
>> 07-04 15:36:42.175: E/mono(6409): at
>> android.graphics.Bitmap.nativeCopy(Native Method)
>> 07-04 15:36:42.175: E/mono(6409): at
>> android.graphics.Bitmap.copy(Bitmap.java:403)
>> 07-04 15:36:42.175: E/mono(6409): at
>> mono.android.view.View_OnClickListenerImplementor.n_onClick(Native Method)
>> 07-04 15:36:42.175: E/mono(6409): at mono.androi
>>
>> What can I do to avoid this? If the Google maps can do this when using
>> the resource id directly, there has to be a way, right?...
>>
>> Any thoughts on this would be highly appreciated.
>>
>> Cheers.
>>
>>
>> --
>> Gonçalo Oliveira
>>
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>
>
> --
> Gonçalo Oliveira
>
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